Move //mojo/services/X/public/... to //mojo/services/X/... (part 1).

mojo/services/asset_bundle/interfaces/asset_bundle.mojom

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 [DartPackage="mojo_services"]
 module mojo.asset_bundle;
 
 interface AssetBundle {
   GetAsStream(string asset_name) => (handle<data_pipe_consumer> asset_data);
 };
 
 interface AssetUnpacker {
   UnpackZipStream(handle<data_pipe_consumer> zipped_assets, AssetBundle& asset_bundle);
 };